prEN ISO 11612 rev

SLOVENSKI STANDARD
oSIST prEN ISO 11612:2011
01-junij-2011
9DURYDOQDREOHND2EOHND]D]DãþLWRSUHGWRSORWRLQSODPHQRP0LQLPDOQH
]DKWHYDQHODVWQRVWL,62',6
Protective clothing - Clothing to protect against heat and flame - Minimum performance
requirements (ISO/DIS 11612:2011)
Schutzkleidung - Kleidung zum Schutz gegen Hitze und Flammen (ISO/DIS 11612:2011)
Vêtements de protection - Vêtements de protection contre la chaleur et les flammes -
Exigences de performance minimales (ISO/DIS 11612:2011)
Ta slovenski standard je istoveten z: prEN ISO 11612
ICS:
13.340.10 Varovalna obleka Protective clothing
oSIST prEN ISO 11612:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 11612:2011
oSIST prEN ISO 11612:2011
EUROPEAN STANDARD
DRAFT
prEN ISO 11612
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2011
ICS 13.340.10 Will supersede EN ISO 11612:2008
English Version
Protective clothing - Clothing to protect against heat and flame -
Minimum performance requirements (ISO/DIS 11612:2011)
Vêtements de protection - Vêtements de protection contre Schutzkleidung - Kleidung zum Schutz gegen Hitze und
la chaleur et les flammes - Exigences de performance Flammen (ISO/DIS 11612:2011)
minimales (ISO/DIS 11612:2011)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 162.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 11612:2011: E
worldwide for CEN national Members.

oSIST prEN ISO 11612:2011
prEN ISO 11612:2011 (E)
Contents Page
Foreword .3

oSIST prEN ISO 11612:2011
prEN ISO 11612:2011 (E)
Foreword
This document (prEN ISO 11612:2011) has been prepared by Technical Committee CEN/TC 162 “Protective
clothing including hand and arm protection and lifejackets” the secretariat of which is held by DIN, in
collaboration with Technical Committee ISO/TC 94 "Personal safety - Protective clothing and equipment".
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 11612:2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
oSIST prEN ISO 11612:2011
oSIST prEN ISO 11612:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 11612
ISO/TC 94/SC 13 Secretariat: SNV
Voting begins on Voting terminates on

2011-03-24 2011-08-24
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION

Protective clothing — Clothing to protect against heat and
flame — Minimum performance requirements
Vêtements de protection — Vêtements de protection contre la chaleur et les flammes — Exigences de
performance minimales
[Revision of second edition (ISO 11612:2008)]
ICS 13.340.10
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the European Committee for Standardization (CEN), and
processed under the CEN-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.

In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.

To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©  International Organization for Standardization, 2011

oSIST prEN ISO 11612:2011
ISO/DIS 11612
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2011 – All rights reserved

oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
Contents Page
Foreword .v
Introduction.vii
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Clothing design.4
4.1 General.4
4.2 Sizes.4
4.2.1 General.4
4.2.2 Suits.4
4.2.3 Additional protective clothing.5
4.3 Pockets and Closures.5
4.4 Hardware.5
4.5 Additional design requirements for molten splash protective garments.5
5 Sampling and pre-treatment.6
5.1 Sampling.6
5.2 Pre-treatment.6
5.2.1 Pre-treatment by cleaning.6
5.2.3. Mechanical pre-treatment.6
5.2.4. Ageing.6
5.3 Conditioning.7
6 General requirements.7
6.1 General.7
6.2 Heat resistance.7
6.2.1 Heat resistance at a temperature of (180 ± 5) °C.7
6.2.2 Optional requirement — Heat resistance at a temperature of (260 ± 5) °C.7
6.3 Limited flame spread (code letter A1 and/or A2) .7
6.3.1 General.7
6.3.2 Testing in accordance with ISO 15025:2000, Procedure A (code letter A1).7
6.3.3 Testing in accordance with ISO 15025:2000, Procedure B (code letter A2).8
6.4 Dimensional change due to cleaning .9
6.4.1 General.9
6.4.2 After pre-treatment as specified in 5.2.2.9
6.5 Physical requirements.9
6.5.1 Tensile strength.9
6.5.2 Tear strength.9
6.5.3 Burst strength for knitted materials .9
6.5.4 Seam strength.9
6.6 Optional requirement — Resistance to water penetration (code letter W).9
6.7 Ergonomic requirements.10
6.8 Fat content of leather .10
6.9 Innocuousness.10
6.9.1 Possible harmful effect.10
6.9.2 pH value.10
6.9.3 Chromium(VI) content.10
7 Heat transmission performance requirements.10
7.1 General.10
7.2 Convective heat (code letter B).10
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
7.3 Radiant heat (code letter C).11
7.4 Molten aluminium splash (code letter D) .11
7.5 Molten iron splash (code letter E).12
7.6 Contact heat (code letter F) .12
7.7 Optional requirement — Protection against the thermal hazards of an electric arc event.12
7.8 Optional test — Whole garment testing for prediction of injury by burns .12
8 Marking.13
9 Information supplied by the manufacturer .14
Annex A (normative) Mechanical pre-treatment for metallized materials.15
A.1 Principle.15
A.2 Sampling.15
A.3 Apparatus (see Figure A.1) .15
A.4 Procedure.15
Annex B (informative) Guidelines for clothing design .17
Annex C (informative) Prediction of burn injury using an instrumented manikin.18
Annex D (informative) Checking of basic ergonomic features of protective clothing.20
D.1 General.20
D.2 Ergonomic assessment questions .20
D.3 Grounds for concluding that a product is unacceptable .21
Annex E (informative) Risk Assessment.22
Annex F (informative) Protection against the thermal effects of electric arc .23
Annex G (informative) Uncertainty of measurements .24
Annex ZA (informative) Relationship between this International Standard and the Essential
Requirements of EU Directive 89/686/EEC.25

iv © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11612 was prepared by Technical Committee ISO/TC 94, Personal safety - Protective clothing and
equipment, Subcommittee SC 13, Protective clothing.
This edition cancels and replaces ISO 11612:2008. It has been prepared in order to:
a) include test procedure for dry-cleaning in normative references;
b) modify clause in design requirements regarding garment overlaps;
c) modify clause in design requirements regarding the areas of the body covered by protective suits;
d) modify clause for ageing due to washing (maximum number of cleaning procedures as indicated by the
manufacturer);
e) modify pretreatment clause to include requirements for single use garments;
f) modify pretreatment clause to specify dimensional stability is carried out after five cleaning cycles;
g) include modified procedure when measuring dimensional stability;
h) modify requirement for optional heat resistance testing at 260 C;
i) modify requirement that hardware is tested only after pretreatment;
j) include statement for flame spread testing in regard to interlining materials;
k) modify test procedure for the flame testing of Labels, badges, retro-reflective materials;
l) modify requirements for tear strength;
m) specify test area for burst strength testing;
n) specify limit for CR(VI) Content;
o) update reference in electric arc clause to include IEC 61482- 2;
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
p) update observation clause (e) in Annex C prediction of burn injury using an instrumented manikin;
q) update references to Annex F to include IEC 61482-1-1, IEC 61482-1-2 and IEC 61482-2;
r) specify that Uncertainty of Measurement - Annex G is normative;
s) update bibliography to include IEC 61482-1-1;

vi © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
Introduction
The purpose of this International Standard is to provide minimum performance requirements for clothing to
protect against heat and flame, which could be worn for a wide range of end uses. All the other standards
listed in the Foreword deal also with clothing to protect against heat and fire, but rather for quite specific
products or end uses.
Within many of the hazards listed in this International Standard there are three performance levels:
⎯ Level 1 to indicate exposure to perceived low risk;
⎯ Level 2 to indicate exposure to perceived medium risk;
⎯ Level 3 to indicate exposure to perceived high risk.
For protection against extreme exposures to radiant heat, there is a fourth performance level to take into
account high performance materials such as aluminized and similar materials. The level of personal protection
to be provided is based on the outcome of the risk assessment and some comments on risk assessment are
given in Annex E.
In this International Standard, an informative annex on ergonomic features (Annex D) is included in the form of
guidelines. Suitable tests for these requirements have not yet been validated internationally.
For complete protection against exposure to heat and/or flame, it is probable that it will be necessary to
protect the head, face, hands and/or feet with suitable PPE and in some cases, appropriate respiratory
protection might also be considered necessary.
[1]
Attention is drawn to CEN Technical Report CEN/TR 14560:2004 , which sets out guidelines for selection,
use, care and maintenance of protective clothing against heat and flame.
Nothing in this International Standard is intended to restrict any jurisdiction, purchaser or manufacturer from
exceeding these minimum requirements. It is one of several standards for clothing that have been developed
to protect persons against heat and/or flames. Other standards include:
⎯ ISO 11611, Protective clothing for use in welding and allied processes;
⎯ ISO 11613, Protective clothing for firefighters — Laboratory test methods and performance requirements;
⎯ ISO 14460, Protective clothing for automobile racing drivers — Protection against heat and flame —
Performance requirements and test methods;
⎯ ISO 15384, Protective clothing for firefighters — Laboratory test methods and performance requirements
for wildland firefighting clothing;
⎯ ISO 15538, Protective clothing for firefighters — Laboratory test methods and performance requirements
for protective clothing with a reflective outer surface;
⎯ EN 469, Protective clothing for firefighters — Performance requirements for protective clothing for
firefighting;
⎯ EN 1486, Protective clothing for fire-fighters — Test methods and requirements for reflective clothing for
specialised fire fighting;
⎯ EN 13911, Protective clothing for firefighters — Requirements and test methods for fire hoods for
firefighters;
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
⎯ EN 15614, Protective clothing for firefighters — Laboratory test methods and performance requirements
for wildland clothing
viii © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 11612

Protective clothing — Clothing to protect against heat and
flame — Minimum performance requirements
1 Scope
This International Standard specifies performance requirements for garments made from flexible materials,
which are designed to protect the wearer’s body, except the hands, from heat and/or flame. For protection of
the wearer’s head and feet, the only items of protective clothing falling within the scope of this International
Standard are gaiters, hoods and overboots. However, concerning hoods, requirements for visors and
respiratory equipment are not given.
The performance requirements set out in this International Standard are applicable to garments which could
be worn for a wide range of end uses, where there is a need for clothing with limited flame spread properties
and where the user can be exposed to radiant or convective or contact heat or to molten metal splashes.
This International Standard is not applicable to protective clothing that is specified by other International
Standards, such as for firefighting in structures and for use in welding and allied processes.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3071, Textiles — Determination of pH of aqueous extract
ISO 3175-2:1998, Textiles — Dry Cleaning and finishing – Part 2 Procedures for tetrachloroethylene
ISO 3376:2002, Leather — Physical and mechanical tests — Determination of tensile strength and
percentage extension
ISO 3377-1, Leather — Physical and mechanical tests — Determination of tear load — Part 1: Double edge
tear
ISO 4045, Leather — Chemical tests — Determination of Ph
ISO 4048, Leather — Chemical tests — Determination of matter soluble in dichloromethane and free fatty acid
content
ISO 5077, Textiles — Determination of dimensional change in washing and drying
ISO 6942:2002, Protective clothing — Protection against heat and fire — Method of test: Evaluation of
materials and material assemblies when exposed to a source of radiant heat
ISO 7000, Graphical symbols for use on equipment — Index and synopsis
ISO 9151, Protective clothing against heat and flame — Determination of heat transmission on exposure to
flame
ISO 9185, Protective clothing — Assessment of resistance of materials to molten metal splash
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
ISO/TR 11610, Protective clothing — Vocabulary
ISO 12127:1996, Clothing for protection against heat and flame — Determination of contact heat transmission
through protective clothing or constituent materials
ISO 13506, Protective clothing against heat and flame — Test method for complete garments — Prediction of
burn injury using an instrumented manikin
ISO 13688, Protective clothing — General requirements
ISO 13934-1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and
elongation at maximum force using the strip method
ISO 13935-2, Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2:
Determination of maximum force to seam rupture using the grab method
ISO 13937-2, Textiles — Tear properties of fabrics — Part 2: Determination of tear force of trouser-shaped
test specimens (Single tear method)
ISO 13938-1, Textiles — Bursting properties of fabrics — Part 1: Hydraulic method for determination of
bursting strength and bursting distension
ISO 15025, Protective clothing — Protection against heat and flame — Method of test for limited flame spread
ISO 17075, Leather — Chemical tests — Determination of chromium(VI) content
ISO 17493, Clothing and equipment for protection against heat — Test method for convective heat resistance
using a hot air circulating oven
EN 343:2009, Protective clothing — Protection against rain
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO/TR 11610 and the following apply.
3.1
ageing
changing of the product performance over time during use or storage
NOTE Ageing is caused by a combination of several factors, such as:
⎯ cleaning, maintenance or disinfecting processes;
⎯ exposure to visible and/or ultra-violet radiation;
⎯ exposure to high or low temperatures or to changing temperatures;
⎯ exposure to chemicals including humidity;
⎯ exposure to biological agents such as bacteria, fungi, insects or other pests;
⎯ exposure to mechanical action such as abrasion, flexing, pressure and strain;
⎯ exposure to contaminants such as dirt, oil, splashes of molten metal, etc.;
⎯ exposure to wear and tear.
3.2
cleaning
process by which a PPE is made again serviceable and/or hygienically wearable by removing any dirt or
contamination
NOTE A cleaning cycle is typically a washing plus drying or a dry cleaning treatment followed, if required, by ironing
or finishing.
2 © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
3.3
clothing assembly
series of outer and under garments to be worn together
3.4
component
any material, part or subassembly used in the construction of an item of PPE
3.5
component assembly
combination of all materials of a multi-layer garment presented exactly as the finished garment construction
3.6
conditioning
keeping samples under standard conditions of temperature and relative humidity for a minimum period of time
3.7
gaiter
removable covering intended to protect the part of the leg below the knee and may cover the shoes
3.8
garment
single item of clothing, which may consist of single or multiple layers
NOTE In this International Standard, where a garment or garments are referred to, this is intended also to include
hoods, gaiters and overboots as appropriate.
3.9
hardware
non-fabric items forming part of or optional extras in a garment
EXAMPLE Metal or plastic buttons or fasteners etc.
3.10
hood
Item of PPE made from flexible material, which covers the head and neck
3.11
innermost lining
innermost face of a component assembly closest to the wearer’s skin
NOTE Where the innermost lining forms part of a material combination, the material combination is regarded as the
innermost lining.
3.12
interlining
layer between the outermost layer and the innermost lining in a multilayer garment
3.13
material
flexible substance/substances of which the item of clothing is made
3.14
outer material
outermost material of which the item of clothing is made
3.15
overboots
single or multiple layers of material covering the footwear to provide protection against heat and/or flame
NOTE Certain types of overboot used for this purpose can also cover parts of the legs and/or ankles.
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
3.16
patch pocket
pocket located on the exterior of a protective garment, which is stitched as a patch over the outer layer of the
protective garment
3.17
pre-treatment
standard way of preparing the samples before testing
NOTE This might include a number of cleaning cycles, submitting the sample to heat, mechanical action or any other
relevant exposure and is finished by conditioning.
3.18
seam
any method of permanent fastening between two or more pieces of material
3.18.1
main seams
seams that are necessary for the integrity of the garment
3.18.2
overlapping seam
seam where all or part of one or more layers of material covers the other layer or layers causing a ridge
4 Clothing design
4.1 General
General requirements which are not specifically covered in this International Standard shall be in accordance
with ISO 13688.
Where more than one garment is needed to meet the requirements of this International Standard, each
garment shall be labelled to ensure that the correct combination is used.
4.2 Sizes
4.2.1 General
Garment sizes shall be in accordance with the requirements of ISO 13688.
4.2.2 Suits
Heat and flame protective suits shall completely cover the upper and lower torso, neck, arms to the wrist and
legs to the ankle. Suits shall consist of:
⎯ a single garment, e.g. an overall or boiler suit or
⎯ a two-piece garment, consisting of a jacket and a pair of trousers. Jackets shall be of sufficient length to
overlap by a minimum of 20 cm with the top of the trousers when standing. An overlap shall be
maintained in all positions and movements expected during use.
Conformity shall be checked by visual inspection, including an assessment of fit and practical testing, such as
physical measurement of the overlap in all positions and movements normally encountered during use, when
a suit of appropriate size is donned by a wearer.
4 © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
4.2.3 Additional protective clothing
Heat and flame protective garments other than suits in accordance with 4.2.2 may be designed to provide
protection for specific parts of the body, e.g. neck curtain, hoods, sleeves, apron and gaiters. They shall be
worn in addition to a suit in accordance with 4.2.2.
Performance testing of partial protective garments shall be carried out on complete clothing assemblies.
Additional protective clothing such as hoods, sleeves, apron and gaiters shall cover the intended areas if worn
with a suit of appropriate size and shall also meet the requirements of this International Standard.
⎯ Conformity shall be checked by visual inspection including an assessment of fit and physical measuring
when the appropriate size of a complete clothing assembly is donned by a wearer when performing the
movements in all positions expected during use.
4.3 Pockets and Closures
Where garments are constructed with pockets, the pockets shall be made of material(s) conforming to 6.2.
and 6.3.
All openings in garments should be designed in such a way that it is possible to close them in order to prevent
entry of heat, flame or hot material. Front openings should be capable of being closed their entire length by
appropriate overlapping.
4.4 Hardware
Hardware penetrating the outer material of a heat and flame protective garment or garment assembly shall not
be exposed to the innermost surface of the garment or the garment assembly.
Conformity shall be checked by visual inspection.
4.5 Additional design requirements for molten splash protective garments
Garments that are designed to protect against the risk of exposure to molten metal splash by meeting the
performance requirements designated by code letters D and E, shall have the following additional design
features.
a) The sleeves of jackets and coveralls and the lower leg regions of trousers, coveralls and bib + brace shall
not have turn-ups.
b) External pockets on jackets, trousers, coveralls and bib + brace, other than side pockets below the waist
which do not extend more than 10° forward of the side seam, shall be covered by flaps at least 20 mm
wider than the opening of the pocket in order to prevent the flap from being tucked into the pocket.
c) Patch pockets shall be made from materials meeting the same protection indices (chosen from A to F)
and the same levels for these indices as the rest of the garment.
d) Overlapping seams on the outside of the garment shall be downward facing and secured in this position.
e) Closures shall be designed with a protective cover flap on the outside of the garment. The maximum
distance between buttonholes shall be 150 mm. If zippers are used, the slide fastener shall be designed
to lock when completely closed. Cuffs may be provided with closures to reduce their width. The closure
and any fold which it creates shall be on the underside of the cuff. Neck openings shall be provided with
closures. Trousers may have side slits which shall have a means of closure and the slit and closure shall
be covered.
f) Pleats in the exterior surface of the garment can act as trapping points for hot/molten materials. If pleats
are present in the garment, the bottoms of the pleats should incorporate a means whereby entrapment of
molten metal can be prevented, for example by incorporating diagonal stitches or some other feature.
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
Conformity to a), b), d) and e) shall be checked by visual inspection; conformity to c) by visual inspection and
physical measurement.
NOTE Further guidance on design of clothing to protect against these risks is given in Annex B.
5 Sampling and pre-treatment
5.1 Sampling
The number of samples and the size of the specimens of garment materials, or garments presented to the
different test methods, shall be in accordance with the respective test standards specified in the requirements.
Samples shall be representative of the component assembly, exactly as used in the finished garment.
Samples for testing shall be taken from the original garment or they may also be cut from the material or
materials as used in the component assembly.
5.2 Pre-treatment
5.2.1 Pre-treatment by cleaning
Before each test specified in Clauses 6 and 7, except 6.4.2, 6.8, and 6.9, the test materials and test
specimens shall be pre-treated by cleaning. If the manufacturer’s instructions indicate that cleaning is not
allowed, i.e. single layer garments, then testing shall be carried out on new material. In addition, 6.3 requires
that the limited flame spread tests shall be carried out both before the pre-treatment and after the pre-
treatment, if cleaning is allowed.
Tests specified in 6.8 and 6.9 shall be carried out in the new state (as received).
The cleaning shall be in line with the manufacturer’s instructions, on the basis of standardized processes. If
the number of cleaning cycles is not specified, the tests shall be carried out after five cleaning cycles, (a
cleaning cycle is one wash and a dry cycle).This shall be reflected in the information supplied by the
manufacturer. If the garment can be washed or dry-cleaned it shall be washed. If only dry-cleaning is allowed
the garment shall be dry-cleaned in accordance with ISO 3175-2.
5.2.2 The test specified in 6.4.2 shall be carried out after five cleaning cycles.
NOTE 1 Manufacturer’s instructions typically indicate one or several of the various methods and processes of
ISO 6330, ISO 15797 or equivalent as standardized processes for cleaning.
NOTE 2 Leather materials are usually not pre-treated by cleaning prior to other tests, as the manufacturer’s
instructions usually indicate that cleaning is not allowed.
5.2.3. Mechanical pre-treatment
Metallized materials shall be pre-treated in accordance with Annex A before being submitted to radiant heat
testing (see 7.3).
5.2.4. Ageing
If it is known that limited flame spread properties may be affected by the number of cleaning cycles, the test
according to 6.3 shall also be performed after the maximum number of cleaning cycles indicated by the
manufacturer.
6 © ISO 2010 – All rights reserved

DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
5.3 Conditioning
Specimens other than leather shall be conditioned for at least 24 h in an atmosphere having a temperature of
(20 ± 2) °C and a relative humidity of (65 ± 5) %. Leather specimens shall be conditioned for at least 48 h in
an atmosphere having a temperature of (20 ± 2) °C and a relative humidity of (65 ± 5) %. Testing shall be
carried out within 5 min of removal from this atmosphere.
6 General requirements
6.1 General
Protective garments that comply with this International Standard shall meet the requirements of clause 6, with
the exception of the requirements of 6.6, which is optional, and shall meet one or more of the requirements of
Clause 7. Such garments shall be marked in accordance with Clause 8.
6.2 Heat resistance
6.2.1 Heat resistance at a temperature of (180 ± 5) °C
All fabrics and hardware, including labels, badges and retroreflective materials used in the garment and/or
clothing assembly shall be tested according to ISO 17493 at a temperature of (180 ± 5) ºC for an exposure
time of 5 min. Materials can be either tested separately or as assembled in the garment and/or clothing
assembly. Test samples shall not ignite, melt or shrink by more than 5 %.To verify shrinkage on multilayer
samples, it may be necessary to close by sewing around the edges of the test samples.
6.2.2 Optional requirement — Heat resistance at a temperature of (260 ± 5) °C
The material of a single layer garment or of the innermost lining of a multilayer garment, which is intended to
be worn next to the skin, can be optionally tested according to ISO 17493 at a temperature of (260 ± 5) °C.
The material shall not ignite or melt or shall not shrink by more than 10% in addition to meeting the
requirement of 6.2.1.
NOTE Heat shrinkage has the potential to reduce the thermal protection level of the garment as it reduces the
insulating air pocket between the garment and the body. Therefore heat shrinkage in heat and flame protective garments
has to be avoided, especially in cases where a heat or flame hazard exists that could hit a large percentage area of the
garment.
6.3 Limited flame spread (code letter A1 and/or A2)
6.3.1 General
Testing of materials and seams shall take place in accordance with ISO 15025:2000, either Procedure A
(code letter A1) or Procedure B (code letter A2) or both in accordance with the existent risk during the
foreseen use. This test shall be carried out both before and after the pre-treatment specified in Clause 5.2.1.
6.3.2 Testing in accordance with ISO 15025:2000, Procedure A (code letter A1)
6.3.2.1 When tested in accordance with ISO 15025:2000, Procedure A, specimens from single layer
garments, including seams, shall meet the following requirements:
a) no specimen shall give flaming to the top or either side edge;
b) no specimen shall give hole formation; except for an interlining that is used for specific protection other
than heat protection
c) no specimen shall melt or give flaming or molten debris;
DRAFT 2011
oSIST prEN ISO 11612:2011
ISO/DIS 11612:2010 (E)
d) the mean value of afterflame time shall be <= 2 s;
e) the mean value of afterglow time shall be <= 2 s.
A glowing inside the charred area is defined in ISO 15025 as afterglow without combustion and for the
purpose of this clause is not regarded as afterglow.
For seams, three specimens containing a structural seam shall be tested in accordance with ISO 15025:2000,
Procedure A. Specimens shall be oriented with the seam running up the centreline of the test specimen so
that the burner flame impinges directly upon it. The seams shall remain intact.
6.3.2.2 If the garment is multilayer, specimens of the component assembly including seams shall be
tested both by applying the flame to the surface
...